The name given to any band that sounds like Nickleback or Creed, who coincidentally sound exactly the same, and tend to get way too much airplay on commercial radio. Other bands who fit into this category are Five for Fighting, Three Doors Down, Rob Thomas

Have you heard Triple M's playlist lately, all they seem to play is Creedleback

The combination of 'Nickelback' and 'Creed', two horrible bands that happen to sound almost identical. Can be used as an adjective to describe mediocre rock music, or a noun: the actual formation of a band combining Nickelback and Creed. The latter would surely be a sign of the apocalypse, and is probably used as a torture device in Hell.

BEHOLD! With the power vested in me by the dark god CTHULHU, I present to you: CREEDLEBACK! Cower in fear and terror!

1. A Commercial Band that sounds like a million other bands often associated with the Cheesedick Rock genre. (See Nickelbreed)
2. Combination of Creed and Nickelback.

Bobby: Hey is that Yellowcard on the radio?
Roadskid: No, it's those other Creedle Backs.
Bobby: No shit, change it.
Roadskid: We're driving in the middle of nowhere there's nothing but Mexican music here... Mexican music it is.